The article discusses the legal status of marijuana in various countries, paying special attention to the situation in the United States, where federal and state laws have been growing apart in permissiveness. Gentner underlines the resultant complications for trademark applications, noting that some cannabis-associated patent filings are allowable. She describes the current regulatory status, the possible impact on interstate commerce of Canada’s recent legalization of recreational marijuana, and concludes that a federal trend towards more leniency is inevitable.